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| jonszr1 | well found out why she doesnt launch good | ||
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Senior Guru
 
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went to fontana yestreday anf ound out 2 things .1) if i put the tire pressure down below 19.5 the tires start moving on the rims . and 2 my clutch pack in the rear end is going out .one cant 60 ft with a one legged bandit . are there any better clutches i can put in the rear end or any little trcks anyone knows that will help ?
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Posted on: 2010/12/5 18:49
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| bogus | Re: well found out why she doesnt launch good | ||
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Grand Imperial Pooh-Bah
 
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Well... short of putting some heavier fluid in the diff, I don't know what to suggest.
I don't like that idea, tho, might harm the bearings. Gordon Killebrew recommends using two bottles of diff lube when changing the diff oil. This is more than the recommended one bottle. |
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Posted on: 2010/12/5 19:02
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| Steve40th | Re: well found out why she doesnt launch good | ||
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Elite Guru
 
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Quote:
But why is Gordon recommending this? Quietness? Drag Racing? |
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Posted on: 2010/12/5 19:18
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| bogus | Re: well found out why she doesnt launch good | ||
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Grand Imperial Pooh-Bah
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I think it's because of what the diff additive does. It essentially adds friction modifiers to the oil. This must do something to the diff clutch, because he suggests it for durability.
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Posted on: 2010/12/5 19:34
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| CentralCoaster | Re: well found out why she doesnt launch good | ||
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How many runs did you get in and how long were you there?
Andy, you're talking about the posi additive right? I have to assume that adds some friction allowing the wet clutch to grip better. Jon, have you checked the posi with a torque wrench? I recall that mine slipped around only 100 ft lbs, which seems awfully weak. I don't know what to compare it to. But I bet there are a ton of vette driving around with dead posis that don't even know it. |
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Posted on: 2010/12/6 3:46
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| jonszr1 | Re: well found out why she doesnt launch good | ||
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i got in 5 runs in total and left around 2 pm . track was a little cold. best run of the day was 12.14@115.93 mph with a 1.903 60ft the other runs were in the 12.30s.a friend of mine darren made a video of 3 of the later runs on utube titled C4 ZR1 12/04/2010 fontana street legal drags .were you there i only saw 1 other c4 it was white had speialized plates and a girl driving it dont know what she ran . another friend was watching the car when i did burn outs and saw only 1 wheel was spinning hard the other was bearly spinning. has anyone looked into another type of locking rearend for the 44 rear end . i have an auburn detroit type locker in my 9 in ford rear in my 68 mustang . i wonder if they make something along those lines for our cars ????
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Posted on: 2010/12/6 18:17
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i have a blast playing with my 4 babies 2 zr1s and 2 mustangs 68 coupe with a jon bennit 408 art car fully rollered c4 with a gearvendors over drive .88 mustang built by my kids with a ported lt5 and a bill boudreau blue printed zf 6 spd. with these 4 ... |
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| bogus | Re: well found out why she doesnt launch good | ||
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Grand Imperial Pooh-Bah
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There is the spool option... and I think Eaton makes something for the D44 carrier.
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Posted on: 2010/12/6 22:41
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| Steve40th | Re: well found out why she doesnt launch good | ||
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Elite Guru
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What about this diff? I knwo teh Viper gears fit, but what of the carrier? http://www.quaife.co.uk/catalogue/products/qdf9s |
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Posted on: 2010/12/6 22:54
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| Matatk | Re: well found out why she doesnt launch good | ||
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GM friction modifier allows the clutches to slip more so there is no chatter in the rear end around corners, etc. Too much, though, and the clutches will slip too much and you lose the characteristics of a LSD. Matthew |
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Posted on: 2010/12/6 23:33
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| BrianCunningham | Re: well found out why she doesnt launch good | ||
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Senior Guru
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Truetrac is an option
http://forums.corvetteforum.com/c4-te ... f-1-4-mile-users-yet.html Quote:
No, the Viper diffs aren't setup to use the halfshafts as upper links. Besides that diff is $4k! |
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Posted on: 2010/12/7 0:20
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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| jonszr1 | Re: well found out why she doesnt launch good | ||
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brian did you own a zr1 ????
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Posted on: 2010/12/7 0:55
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i have a blast playing with my 4 babies 2 zr1s and 2 mustangs 68 coupe with a jon bennit 408 art car fully rollered c4 with a gearvendors over drive .88 mustang built by my kids with a ported lt5 and a bill boudreau blue printed zf 6 spd. with these 4 ... |
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| BrianCunningham | Re: well found out why she doesnt launch good | ||
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Senior Guru
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No, but I called Quaiffe.
ZR1's run the same D44 I have. That diff is one of the reasons Vipers did so well against the ZR1's back when they ran together in World Challenge. |
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Posted on: 2010/12/7 1:13
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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| cuisinartvette | Re: well found out why she doesnt launch good | ||
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Elite Guru
 
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Eaton makes a great posi unit
Only need 1 of those posi additive tubes, more is not better IMO youll launch better with a heavier flywheel knowing the characteristic of a heavily ported LT5 opinions will vary |
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Posted on: 2010/12/7 3:11
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| CentralCoaster | Re: well found out why she doesnt launch good | ||
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Well in that case, I don't think more is better either. I'd want as little as possible needed to do the job. |
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Posted on: 2010/12/7 14:36
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| jonszr1 | Re: well found out why she doesnt launch good | ||
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Senior Guru
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ron , with the heavier flywheel even leaving at 1500 rpms just caused the car to go up i smoke . i think i am going to go to the eaton diff i like the fact of not having clutches . i am going to bill boudreaus today and go with a steel 19lb flywheel that i got from callaway and a stage 3 ceramic disc clutch. he feels that the just a little heavier flywheel but not 46 lb stk will give me the best of both worlds . will see in jan .
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Posted on: 2010/12/7 16:02
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i have a blast playing with my 4 babies 2 zr1s and 2 mustangs 68 coupe with a jon bennit 408 art car fully rollered c4 with a gearvendors over drive .88 mustang built by my kids with a ported lt5 and a bill boudreau blue printed zf 6 spd. with these 4 ... |
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| cuisinartvette | Re: well found out why she doesnt launch good | ||
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Elite Guru
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Think Carolina Clutch sells a billet steel 25 or 30 lber not a bad compromise. Personal taste I guess.
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Posted on: 2010/12/8 3:59
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